A fantasy medieval Sims would be my choice. Have your Sims be either commoners, nobles, clerks, royalty or everyone in one place. Take care of your place, whether you live in a rural village, a forest, or a larger bustlin city. Be an adventurer, a hunter, a farmer or take up some other trade. Of course magic and occult Sims are a must.
I also wouldn't mind a Castaway Sims, where all your Sims (NPC Sims at communal lots will be created by you) are stuck on an island. Technology like a small computer would be available, but you'd have to work hard to get your daily dose of electricity.
